Mr. Sugawara is Kenta and Yousuke's dad. He appears time and time again in WEED Guidan, mainly to comfort the boys or as a background character.
Winds of Zion
His wife suffers from cancer and has been hospitalized. He does not tell his sons about cancer, but Yosuke gets to hear about the hospital nurses.
When he learns that his younger son being bullied, he would like to contact principal, but Yosuke claims it only to aggravate the situation. Later, at the temple, he and Yosuke see how Kenta fights against bullies. He initially forbade the older son from intervening in the situation, because Kenta wanted to begin to defend themselves.
After his wife died, they moves to Shizuo.